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Hi! I want to datalog fuel pressure using the analog output from my sct X3. I'm using a 0-100psi autometer sensor part# 2246 0-5V.


1 - I will take my 5V source from the TPS sensor
2- signal from sensor will go to analog 2 on the firewire cable ( pin#5)
3- ground from sensor will go to analog 2 ground on the firewire cable (pin#6)


My question is do i need to ground the sensor externaly or the ground will only be done through the firewire cable and via the X3 device ?

Thanks!
 

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